三江平原沼泽土微观特性试验研究  

Study of microstructure properties of swamp soil in Sanjiang Plain

作　　者：李丽华[1,2] 陈轮[1] 高盛焱[1] 邵庆春[3] 陈国双[3] 刘彩云[4] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084 [2]中国地质大学工程学院武汉430074 [3]中国科学院东北地理与农业生态研究所,长春130012 [4]中国矿业大学土木建筑工程系,北京100083

出　　处：《岩土力学》2009年第8期2295-2299,共5页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.50578086)

摘　　要：从微观形态、微结构特征、粒度分析、土颗粒间的排列方式、孔隙大小分布、有机质含量以及矿物成分等方面对三江平原的两种沼泽土和北京翠湖湿地土进行了一系列微观结构的对比试验。结果表明:沼泽白土和翠湖湿地土与一般软土性质相似,但沼泽黑土含水率、液性指数、孔隙比、孔隙数量、孔径和孔隙体积远远大于沼泽白土和翠湖湿地土,有机质含量最大,特性明显突出。研究成果有助于提高对沼泽土特性的认识,可为沼泽地陷落体救助和沼泽湿地保护和合理开发等工程建设提供参考。Two typical swamp soils in Sanjiang Plain and another wetland soil in Cuihu, Beijing are tested in aspects of micromorphic, microstructure characteristic, mode arrangement of soil particles, pore-size distribution, organic content and mineral composition etc. Test results show that moisture content, liquidity index, void ratio, void number, void size, void volume and organic content of the black swamp soil are far more than that of the white swamp soil; and the wetland soil, which indicated that the properties of the swamp soil are obviously different. Study results can provide references for understanding properties of swamp soil, sinking salvage, protection, rational exploitation and engineering construction in swamp regions.

关 键 词：沼泽土 微观结构 软土 

分 类 号：TU443[建筑科学—岩土工程]